(19)

(11)

EP 0 386 022 A1

(12)

(43) Date of publication: 12.09.1990 Bulletin 1990/37 (21) Application number: 88908273.0 (22) Date of filing: 21.09.1988

(51) International Patent Classification (IPC):  F16G 11/ 04( . ) F16G 11/ 10( . ) (86) International application number: PCT/GB1988/000762 (87) International publication number: WO 1989/002994 (06.04.1989 Gazette 1989/08)

(84) Designated Contracting States: AT BE CH DE FR IT LI LU NL SE (30) Priority: 26.09.1987 GB 19870022683 03.02.1988 GB 19880002345 (71) Applicant: GRIPPLE LIMITED Sheffield S12 2DB (GB)	(72) Inventors: FACEY, Hugh, David Parkhead Sheffield S11 9PY (GB) SHAWCROSS, Brian, Edward Cheadle Hulme Cheshire SK8 7EH (GB) (74) Representative: Hulse, Thomas Arnold  Hulse & Co. Eagle Star House, Carver Street Sheffield S1 4FP Sheffield S1 4FP (GB)